as i was leaving work, i glanced to the south and observed mars. as i was looking in that direction a small light began moving quickly back and forth inches from mars in the sky. it moved in an almost vibrating motion, and up and down, similar to a hot coal on the end of a stick in the dark. the reason it struck me was the fact that i witnesssed a shiny silver object hovering in the sky in a similar location two summers ago. there were no distinguishing marks, the shape wasnt even visible from my vantage point. it resembled a star in size and shape, with the peculiarity coming from its motion. i stared at the object for about one minute before it disappeared. i kept my eyes on that spot in the sky for approximately five minutes after with no sign of the object or rising stars in the viscinty.